Space Rocks - Part 11

Space_Rocks_tutorial/working/scenes/enemy.tscn

@@ -1,8 +1,9 @@
-[gd_scene load_steps=6 format=1]
+[gd_scene load_steps=8 format=1]
 
 [ext_resource path="res://scripts/enemy.gd" type="Script" id=1]
 [ext_resource path="res://art/sheet.ufoGreen.atex" type="Texture" id=2]
 [ext_resource path="res://scenes/enemy_paths.tscn" type="PackedScene" id=3]
+[ext_resource path="res://audio/enemy_laser.wav" type="Sample" id=4]
 
 [sub_resource type="CircleShape2D" id=1]
 
@@ -26,8 +27,18 @@ tracks/0/keys = {
 "values": [ 0.0, 180.0, 360.0 ]
 }
 
+[sub_resource type="SampleLibrary" id=3]
+
+samples/enemy_laser = {
+"db": -3.0,
+"pitch": 1.0,
+"priority": 0,
+"sample": ExtResource( 4 )
+}
+
 [node name="enemy" type="Area2D"]
 
+transform/pos = Vector2( -47.6131, -51.6943 )
 input/pickable = true
 shapes/0/shape = SubResource( 1 )
 shapes/0/transform = Matrix32( 1, 0, 0, 1, 0, 0 )
@@ -37,10 +48,13 @@ gravity = 98.0
 linear_damp = 0.1
 angular_damp = 1.0
 script/script = ExtResource( 1 )
+__meta__ = {
+"_edit_group_": true
+}
 
 [node name="sprite" type="Sprite" parent="."]
 
-transform/rot = 56.4122
+transform/rot = 89.4901
 transform/scale = Vector2( 0.8, 0.8 )
 texture = ExtResource( 2 )
 
@@ -64,10 +78,32 @@ autoplay = "rotate"
 
 [node name="enemy_paths" parent="." instance=ExtResource( 3 )]
 
-[node name="visible" type="VisibilityNotifier2D" parent="."]
-
-rect = Rect2( -10, -10, 20, 20 )
-
-[connection signal="exit_screen" from="visible" to="." method="_on_visible_exit_screen"]
+[node name="bullet_container" type="Node" parent="."]
+
+[node name="shoot_timer" type="Timer" parent="."]
+
+process_mode = 1
+wait_time = 1.0
+one_shot = false
+autostart = false
+
+[node name="sounds" type="SamplePlayer" parent="."]
+
+config/polyphony = 1
+config/samples = SubResource( 3 )
+default/volume_db = 0.0
+default/pitch_scale = 1.0
+default/pan = 0.0
+default/depth = 0.0
+default/height = 0.0
+default/filter/type = 0
+default/filter/cutoff = 5000.0
+default/filter/resonance = 1.0
+default/filter/gain = 1.0
+default/reverb_room = 2
+default/reverb_send = 0.0
+default/chorus_send = 0.0
+
+[connection signal="timeout" from="shoot_timer" to="." method="_on_shoot_timer_timeout"]
 
 

Space_Rocks_tutorial/working/scenes/enemy_bullet.tscn

@@ -0,0 +1,48 @@
+[gd_scene load_steps=4 format=1]
+
+[ext_resource path="res://scripts/enemy_bullet.gd" type="Script" id=1]
+[ext_resource path="res://art/beams.png" type="Texture" id=2]
+
+[sub_resource type="CapsuleShape2D" id=1]
+
+custom_solver_bias = 0.0
+radius = 5.02902
+height = 42.6393
+
+[node name="enemy_bullet" type="Area2D"]
+
+transform/pos = Vector2( 511.316, 242.307 )
+input/pickable = true
+shapes/0/shape = SubResource( 1 )
+shapes/0/transform = Matrix32( 1, 0, 0, 1, 0, 0 )
+shapes/0/trigger = false
+gravity_vec = Vector2( 0, 1 )
+gravity = 98.0
+linear_damp = 0.1
+angular_damp = 1.0
+script/script = ExtResource( 1 )
+__meta__ = {
+"_edit_group_": true
+}
+speed = 700
+
+[node name="bullet" type="Sprite" parent="."]
+
+texture = ExtResource( 2 )
+region = true
+region_rect = Rect2( 8.125, 293.609, 62, 98.5296 )
+
+[node name="collision" type="CollisionShape2D" parent="."]
+
+visibility/visible = false
+shape = SubResource( 1 )
+trigger = false
+_update_shape_index = 0
+
+[node name="visible" type="VisibilityNotifier2D" parent="."]
+
+rect = Rect2( -10, -10, 20, 20 )
+
+[connection signal="exit_screen" from="visible" to="." method="_on_visible_exit_screen"]
+
+

Space_Rocks_tutorial/working/scenes/main.tscn

@@ -118,6 +118,15 @@ wait_time = 3.0
 one_shot = true
 autostart = false
 
+[node name="enemy_timer" type="Timer" parent="."]
+
+process_mode = 1
+wait_time = 3.0
+one_shot = true
+autostart = false
+
 [connection signal="timeout" from="restart_timer" to="." method="_on_restart_timer_timeout"]
 
+[connection signal="timeout" from="enemy_timer" to="." method="_on_enemy_timer_timeout"]
+
 

Space_Rocks_tutorial/working/scenes/player.tscn

@@ -112,7 +112,6 @@ texture = ExtResource( 6 )
 transform/pos = Vector2( 0, 35 )
 frames = SubResource( 3 )
 animation = "default"
-frame = 2
 playing = true
 
 [connection signal="body_enter" from="." to="." method="_on_player_body_enter"]

Space_Rocks_tutorial/working/scripts/enemy.gd

@@ -1,11 +1,17 @@
 extends Area2D
 
+var bullet = preload("res://scenes/enemy_bullet.tscn")
+
 onready var paths = get_node("enemy_paths")
+onready var bullet_container = get_node("bullet_container")
+onready var shoot_timer = get_node("shoot_timer")
+onready var sounds = get_node("sounds")
 
 var path
 var follow
 var remote
-var speed = 250
+var speed = 150
+var target = null
 
 func _ready():
 	set_process(true)
@@ -16,10 +22,29 @@ func _ready():
 	follow.set_loop(false)
 	remote = Node2D.new()
 	follow.add_child(remote)
+	shoot_timer.set_wait_time(1.5)  # vary by level
+	shoot_timer.start()
 
 func _process(delta):
 	follow.set_offset(follow.get_offset() + speed * delta)
 	set_pos(remote.get_global_pos())
+	if follow.get_unit_offset() > 1:
+		queue_free()
+
+func shoot1():
+	sounds.play("enemy_laser")
+	var dir = get_global_pos() - target.get_global_pos()
+	var b = bullet.instance()
+	bullet_container.add_child(b)
+	b.start_at(dir.angle(), get_global_pos())
+
+func shoot3():
+	var dir = get_global_pos() - target.get_global_pos()
+	for a in [-0.2, 0, 0.2]:
+		sounds.play("enemy_laser")
+		var b = bullet.instance()
+		bullet_container.add_child(b)
+		b.start_at(dir.angle() + a, get_global_pos())
 
-func _on_visible_exit_screen():
-	queue_free()
+func _on_shoot_timer_timeout():
+	shoot3()

Space_Rocks_tutorial/working/scripts/enemy_bullet.gd

@@ -0,0 +1,18 @@
+extends Area2D
+
+var vel = Vector2()
+export var speed = 800
+
+func _ready():
+	set_fixed_process(true)
+
+func start_at(dir, pos):
+	set_rot(dir)
+	set_pos(pos)
+	vel = Vector2(speed, 0).rotated(dir + PI/2)
+
+func _fixed_process(delta):
+	set_pos(get_pos() + vel * delta)
+
+func _on_visible_exit_screen():
+	queue_free()

Space_Rocks_tutorial/working/scripts/main.gd

@@ -2,11 +2,13 @@ extends Node
 
 var asteroid = preload("res://scenes/asteroid.tscn")
 var explosion = preload("res://scenes/explosion.tscn")
+var enemy = preload("res://scenes/enemy.tscn")
 onready var spawns = get_node("spawn_locations")
 onready var asteroid_container = get_node("asteroid_container")
 onready var expl_sounds = get_node("expl_sounds")
 onready var HUD = get_node("HUD")
 onready var player = get_node("player")
+onready var enemy_timer = get_node("enemy_timer")
 
 func _ready():
 	set_process(true)
@@ -16,6 +18,9 @@ func _ready():
 
 func begin_next_level():
 	global.level += 1
+	enemy_timer.stop()
+	enemy_timer.set_wait_time(rand_range(2, 4))
+	enemy_timer.start()
 	HUD.show_message("Wave %s" % global.level)
 	for i in range(global.level):
 		spawn_asteroid("big", spawns.get_child(i).get_pos(),
@@ -57,7 +62,12 @@ func explode_player():
 	HUD.show_message("Game Over")
 	get_node("restart_timer").start()
 
-
-
 func _on_restart_timer_timeout():
 	global.new_game()
+
+func _on_enemy_timer_timeout():
+	var e = enemy.instance()
+	add_child(e)
+	e.target = player
+	enemy_timer.set_wait_time(rand_range(20, 40))
+	enemy_timer.start()